Saint Eric's Cathedral is a Roman Catholic cathedral in Stockholm, Sweden. It is located on Södermalm, the southern part of central Stockholm. It was built in 1892 and was raised to the status of a cathedral in 1953, when the Roman Catholic Diocese of Stockholm was created (still the only one in Sweden). The substantial increase in the number of Catholics in Stockholm and Sweden, mostly as a result of immigration after World War II, made the old church insufficient, and an extension, designed by architects Hans Westman and Ylva Lenormand, was inaugurated in 1983, at the 200th anniversary of the re-establishment in 1783 of the Roman Catholic Church in Lutheran Sweden.